Rudolf rausch



UNITED STATES PATENT OFFICE.

RUDOLF RAUSOH, OF VIENNA, AUSTRIA-HUNGARY.

PROCESS OF PRODUCING lNLAlD WORK ONSTONES.

$EECIFIGATION forming part of Letters Patent No. 486,590, dated November22, 1892.

Application filed F bruary 1, 1892- Serial No. 419,983. (No specimens!)To all whom it may concern.-

Be it known that I, RUDOLF RAUSOH, a subject of the Emperor ofAustria-Hungary, residing at Vienna, Austria-Hungary, have inventedImprovements in Inlaid Work on Stones, (for which I have not obtained apatent in any country,) of which the followingis a specification.

The object of this invention is to produce mother-of-pearl, snail, ormussel shells or metal inlaid work on all kind of stones for fancygoods, furniture, 80c.

The invention consists in the new and improved process and means ofproducing inlaid work on stones, substantially as will be hereinaftermore fully described, and finally embodied in the clauses of the claim.

To carry my invention into efiect, the outlines of the desired pattern,figure, or ornament are first drawn and cut by a sharp and pointedinstrument or tool on the surface of the stone. Acid is then applied onthe so-produced engraving by means of a brush or other suitableappliances until the desired depth is obtained. As the acid never willproduce uniform-shaped cavities, the latter are excavated and dressed bymeans of hand-tools. The pattern or design is now made up ofmother-ofpearl, snail, or mussel shells or metal, either by cement or byother adhesive ingredients, to correspond in shape and design with theexcavations on the stone and are when dried cemented therein; or, ifpreferred, the pattern can be made in sections and each sectionseparably cemented into its respective place in the excavation. WVhenthe cement has dried, the stone, with its inlaid work, is polished andfinished.

I am aware of English Patent No. 1,744, granted in 1879 to A. W.Pennington, wherein he claims the method and means of producingornamental designs in different-colored metals and the manufacture fromsaid material of various articles of jewelry, &c.; but that is not whatI claim.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

The above-described method of producing mother-of-pearl, snail, ormussel shells, or metal inlaid work on stones, consisting first indrawing and cutting with a sharp tool the desired ornament or figure onthe stone, then in applying acid on the so-produced engraving until therequired depth is obtained, afterward in finishing and dressing theso-produced excavations bya hand-tool, then again in combining themother-of-pearl, snail, or mussel shells, or metal into the patterncorresponding in shape with the excavations on the stone, and finally incementing said patterns in Whole or in sections into said excavations,substantially as described, and for the purposes set forth.

In testimony whereof I sign this specification in the presence of twosubscribing witnesses.

RUDOLF RAUSCI-l. WVitnesses:

MORIR GELBHAN, W. B. M RPHY.

